在每个请求输出（dev服务器）之前显示唯一标识符 这是一个例子：
$ rails s
=> Booting Puma
=> Rails 5.0.3 application starting in development on http://localhost:3000
=> Run `rails server -h` for more startup options
Puma starting in single mode...
* Version 3.10.0 (ruby 2.4.1-p111), codename: Russell's Teapot
* Min threads: 5, max threads: 5
* Environment: development
* Listening on tcp://0.0.0.0:3000
Use Ctrl-C to stop
[5664e61d-73e6-4ce3-af27-d82aa04abebd] Started GET "/plans" for 127.0.0.1 at 2017-10-17 17:06:48 -0300
[5664e61d-73e6-4ce3-af27-d82aa04abebd] ActiveRecord::SchemaMigration Load (0.6ms) SELECT "schema_migrations".* FROM "schema_migrations"
[5664e61d-73e6-4ce3-af27-d82aa04abebd] DEPRECATION WARNING: before_filter is deprecated and will be removed in Rails 5.1. Use before_action instead. (called from <class:ApplicationController> at /Users/tdonatti/Sites/rails/vmsapi/app/controllers/application_controller.rb:10)
[5664e61d-73e6-4ce3-af27-d82aa04abebd] Processing by PlansController#index as HTML
[5664e61d-73e6-4ce3-af27-d82aa04abebd] User Load (0.4ms) SELECT "users".* FROM "users" WHERE "users"."id" = $1 LIMIT $2 [["id", 9],
["LIMIT", 1]]
[5664e61d-73e6-4ce3-af27-d82aa04abebd] Plan Load (0.4ms) SELECT "plans"."id", "plans"."title", "plans"."nod", "plans"."price", "plans"."status" FROM "plans"
[5664e61d-73e6-4ce3-af27-d82aa04abebd] Completed 200 OK in 38ms (Views: 9.4ms | ActiveRecord: 7.4ms)
我想要隐藏此标识符[5664e61d-73e6-4ce3-af27-d82aa04abebd]
我不确定为什么以及它如何显示但输出极其嘈杂且难以跟踪。
答案 0 :(得分：0)
在配置文件中，您必须将 log_tags 设置为
config.log_tags = [ :uuid ]
删除它，你应该好好去。
当你有时间时，日志标签有利于调试 - give this a read。